Wearing a white broderie anglaise blouse and cropped caramel culottes, Kate finished off her fresh look with a pair of white trainers and a polish blowdry.
Back in April it was revealed that Kate had turned to a very stylish friend to give her a fashion overhaul, after new sister-in-law Meghan Markle's designer collection began to make waves.
“She is believed to have brought in an old college friend, Virginia Chadwyck Healey, and she comes with quite a pedigree," a royal insider explained.
“Virginia worked at Vogue for 12 years and she has known Prince William and Kate for many years and was at their wedding in 2011.
Kate's stylish display comes hours after a royal insider claimed her family's appearance at the show a day earlier - Meghan and Harry's first wedding anniversary - was a show of "anything you can do, we can do better."
The Duke and Duchess of Sussex shared a collection of never-before-seen photographs from their May 19, 2018 wedding via their Instagram account to mark the occasion.
That same day, Kate and William shared their own footage from a visit to the gardens with their three children.